API Reference

// Generate a timestamped SHA-256 hashed API token for secure authentication
using System.Security.Cryptography;
using System.Text;

// Set the QC_USER_ID and QC_API_TOKEN environment variables with values from https://www.quantconnect.com/settings/.
var yourUserId = Environment.GetEnvironmentVariable("QC_USER_ID") ?? "0";
var yourApiToken = Environment.GetEnvironmentVariable("QC_API_TOKEN") ?? "_____";

Dictionary<string, string> GetHeaders()
{
    // Get timestamp
    var timestamp = ((DateTimeOffset)DateTime.UtcNow).ToUnixTimeSeconds().ToString();
    var timeStampedToken = $"{yourApiToken}:{timestamp}";

    // Get hashed API token
    var hashBytes = SHA256.HashData(Encoding.UTF8.GetBytes(timeStampedToken));
    var hash = BitConverter.ToString(hashBytes).Replace("-", "").ToLowerInvariant();
    var authentication = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{yourUserId}:{hash}"));

    // Create headers dictionary.
    return new Dictionary<string, string>
    {
        { "Authorization", $"Basic {authentication}" },
        { "Timestamp", timestamp }
    };
}

# Generate a timestamped SHA-256 hashed API token for secure authentication
from os import environ
from base64 import b64encode
from hashlib import sha256
from time import time

# Set the QC_USER_ID and QC_API_TOKEN environment variables with values from https://www.quantconnect.com/settings/.
USER_ID = environ.get('QC_USER_ID', 0)
API_TOKEN = environ.get('QC_API_TOKEN', '_____')

def get_headers():
    # Get timestamp
    timestamp = f'{int(time())}'
    time_stamped_token = f'{API_TOKEN}:{timestamp}'.encode('utf-8')

    # Get hashed API token
    hashed_token = sha256(time_stamped_token).hexdigest()
    authentication = f'{USER_ID}:{hashed_token}'.encode('utf-8')
    authentication = b64encode(authentication).decode('ascii')

    # Create headers dictionary.
    return {
        'Authorization': f'Basic {authentication}',
        'Timestamp': timestamp
    }

// Create HTTP client with authentication headers.
var client = new HttpClient();
client.BaseAddress = new Uri("https://www.quantconnect.com/api/v2/");
foreach (var header in GetHeaders())
{
    client.DefaultRequestHeaders.Add(header.Key, header.Value);
}

// Make POST request.
var request = new StringContent("{}", Encoding.UTF8, "application/json");
var response = await client.PostAsync("<requestUrl>", request);
var content = await response.Content.ReadAsStringAsync();

# Create POST Request with headers
from requests import post
BASE_URL = 'https://www.quantconnect.com/api/v2/'

response = post(f'{BASE_URL}/<request_url>',
                headers = get_headers(),
                json = {})    # Use json keyword to send the payload
content = response.text